He failed in the exam again because he ________ confidence to pass it．

He failed in the exam again because he ________ confidence to pass it．

A.lacked

B.was lacking

C.lacked of

D.was lacking of

答案及解析： A

句意为：“他又一次没通过考试因为他缺乏通过的信心。”lack用作及物动词，D项通常是be lacking in搭配。